very good so far. there are no losses when I inflate my son's bike and my scooter. with other hand pumps, the oil would come out. also, it inflates balls and other things just fine. I haven't tried it on a car yet, but in general, it seems to be a very quality construction. time will tell. the only downside is the packaging; I would prefer something to be more compact when you pack it, but okay.

I got it mainly to inflate air in a machine and a car.
The pressure gauge is accurate and the valve does not leak. The overall build quality is very good.
We will see its durability over time.